# Algebraic simplification problem after a u-substitution derivation

Not what you're looking for?

The attached file contains a function that needs to have the first order derivative taken. I took the derivative, but I am making a mistake in the algebra simplification of the result. Would you please take a look.

I am working on a dynamic programming problem, and one part of it requires that I take the derivative of the function.

Below is the work that I did.

My study partner worked it out like this:

I think there is a sign mistake in my partner's work. He thinks there is a sign mistake in mine.

Would you work the problem and let me see where the mistake is?

##### Purchase this Solution

##### Solution Summary

The algebraic simplification problem for after u-substitution derivations are determined.

##### Solution Preview

There's a mistake in your partner's work:

From ... f '(x) = 4x + [ (2/5) * ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Probability Quiz

Some questions on probability

##### Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

##### Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

##### Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

##### Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.